Who are the original members of the group U2?

Rather unusually given the long period of time U2 has been active, U2 has always has the same line-up. Bono, Edge, Larry and Adam are the original members and remain the only members of U2. Initally, for the first month or so there were other members (Edge's older brother being one of them) however, the band (which wasnt called U2 at the time) was nothing more than a group of kids in a garage at that point and they were long gone by the time U2 launched any material.